1. What are the applications of steel structures?
Steel structures are mainly used in the field of industrial plants and infrastructure.
The steel structure industry is an emerging industry. Steel structure building uses steel plate, hot-rolled, cold-formed, or welded sections, connected by connectors. Building steel structures are structures that can bear and transmit loads.
Welded sections mainly include I-beam, H-beam, and pressurized steel plate.
Connectors mainly include bolts, high-strength bolts, etc.
2. What are the advantages of steel structure buildings?
Steel structure building has a series of advantages such as high strength, light deadweight, good seismic performance, short construction period, high industrialization, and less environmental pollution. The characteristics of steel structures include heavy load, high height, large span, lightweight, high bearing capacity, and easy construction.
It is commonly used in industrial workshop plants, large-span prefabricated steel structure workshops, prefabricated steel structure storage warehouses, steel structure vegetable greenhouses, steel poultry farms, multi-high-rise steel structure civil buildings, etc.
3. History of Steel Structure
The world's first cast iron arch bridge was the Colebrookdale Bridge in England. Since its completion in 1779, the development history of steel structures has been several hundred years.
In 1889, the Eiffel Tower and the Mechanical Pavilion designed at the French World Expo were a milestone in the history of steel structures. The Eiffel Tower was an elevated iron structure with a tower height of 328m, and the Mechanical Pavilion was a large-span structure with a length of 420m and a span of 115m. 115m, the structural method utilizes the principle of a three-hinged arch.
These two buildings set a new world architectural record at that time and shocked the whole world.
In 1931, the Empire State Building in New York was completed, with 102 floors and a height of 381 m.
In 1970, the world's tallest building, the World Trade Center in New York, was completed, with a height of 410 m. All of these buildings have a great influence on the history of steel structures.
In the process of production, construction, and use after the completion of the steel structure, it has superior energy saving, environmental protection, safety, earthquake resistance, and many other features, which are in line with the principle of sustainable development of mankind. Therefore, steel structure, as an emerging industry in China's construction field, has been highly valued by the state and listed as one of the top ten new technologies of the Ministry of Construction.
4. Advantages of Prefabricated light steel structure factory building in terms of Energy Saving
- Prefabricated light steel structure factory buildings do not use traditional concrete, which significantly reduces the consumption of resources such as cement, sand, and gravel, and thus significantly reduces the carbon emissions from the excavation, smelting and transportation of minerals.
- The weight of prefabricated light steel structure factory buildings is reduced by about 40%, saving about 30% of underground piling.
- The construction process eliminates the need for wooden formwork and scaffolding, and if the market share of steel construction grows by 5 percentage points, the equivalent of 9,000 hectares of forests could be cut down.
- The predominantly assembly-based construction on-site significantly reduces water consumption during construction and reduces noise, wastewater, and dust pollution on the construction site.
- Reduction of sand and gravel mining and construction waste emissions.
- The CO2 emission of prefabricated light steel structure factory buildings is about 480kg/m2, which is more than 35% lower than the carbon emission of 740.6kg/m2 of traditional concrete.
- CCA lightweight grouted wall has good self-insulation function, which is 3 times the insulation performance of the traditional brick wall, and significantly reduces the operation energy consumption.
- When the prefabricated light steel structure factory building is dismantled, the recycling rate of the main structure material is over 90%, which is about 60% less than the traditional concrete waste emission.
5. Cost of Steel Structure
- Project Cost
The project cost of Minghua Steel Structure accounts for about 50%, and the structural cost accounts for less than 30% of the project cost, so the structural cost accounts for less than 15% of the total project cost. Although the cost of steel structure is 10-20% higher than that of reinforced concrete, the labor and foundation treatment cost of steel structure is lower, and the steel can be recycled, so the project cost of steel structure is lower than that of concrete structure in general.
- Space utilization
The advantages of steel buildings are generally evident above the 20th floor. For example, the Universal Center is a steel structure. If reinforced concrete is used, the space utilization rate of the ground floor will be very low. Therefore, considering that the effective use area of steel structure is larger than that of concrete structure (the beam and column section area can be reduced by more than 50%), the comprehensive economic benefit of steel structure is higher than that of concrete structure.
In the long run, prefabricated steel structure warehouse has higher economic benefits.
6. The steel industry supports the steel structure industry
The upstream industry of steel structure is the raw material supply industry such as iron and steel. The iron and steel industry is the material foundation for the development of the steel structure industry, and the technological progress of the iron and steel industry has created favorable conditions for the application of steel structures. Some big enterprises in the iron and steel industry have begun the research and development of varieties and technologies of steel used in building structures, and have successively developed high-strength steel and fire-resistant, weather-resistant, seawater-resistant, laminar tear-resistant and low-temperature-resistant steel, as well as H-beam steel, color-coated metal sheet, cold-formed steel, etc., which have laid a good foundation of the application of the development of the steel structure industry.
